7.00.02 - EMAVG Arguments - Aster Analytics

Teradata Aster® Analytics Foundation User GuideUpdate 2

Aster Analytics
Release Number
Release Date
September 2017
Content Type
Programming Reference
User Guide
Publication ID
English (United States)
[Optional] Specifies the input column names for which the exponential moving average is to be computed. Default behavior: The function copies every input column to the output table but does not compute any exponential moving averages.
[Optional] Specifies the damping factor, a value in the range [0, 1], which represents a percentage in the range [0, 100]. For example, if alpha is 0.2, the damping factor is 20%. A higher alpha discounts older observations faster. Default: 0.1.
[Optional] Specifies the number of rows to skip before calculating the exponential moving average. The function uses the arithmetic average of these rows as the initial value of the exponential moving average. The value n must be an integer. Default: 2.
[Optional] Specifies whether to include the starting rows in the output table. Default: 'false'. If you specify 'true', the output columns for the starting rows contain NULL, because their exponential moving average is undefined.